Load store circuit with dedicated single or dual bit shift circuit and opcodes for low power accelerator processor

Abstract

Described examples include integrated circuits such as microcontrollers with a low energy accelerator processor circuit or other application specific integrated processor circuit including a load store circuit operative to perform load and store operations associated with at least one register and a low gate count shift circuit to selectively shift the data of the register by only an integer number bits less than the register data width without using a barrel shifter for low power operation to support vector operations for FFT or filtering functions.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application is related to U.S. patent application Ser. No. 14 / 678,944, filed Apr. 4, 2015 and entitled “LOW ENERGY ACCELERATOR PROCESSOR ARCHITECTURE WITH SHORT PARALLEL INSTRUCTION WORD AND NON-ORTHOGONAL REGISTER DATA FILE,” and to U.S. patent application Ser. No. 14 / 678,939, filed Apr. 4, 2015 and entitled “LOW ENERGY ACCELERATOR PROCESSOR ARCHITECTURE WITH SHORT PARALLEL INSTRUCTION WORD,” which applications are hereby incorporated by reference.TECHNICAL FIELD[0002]The present disclosure relates to electronic processor circuits and more particularly to microcontrollers and other integrated circuits.BACKGROUND[0003]Microcontroller units (MCUs) and other microprocessors are often used for battery powered user devices, for control systems to process data from sensors, or for other applications in which processing speed and low power consumption are important. Many applications involve analog signals received by a processor ci...

AI Technical Summary

Benefits of technology

The patent discusses the use of a low energy accelerator (LEA) processor circuit or other application specific integrated processor (ASIP) circuit in integrated circuits such as microcontrotor units (MCUs). The circuit includes a load store circuit and a low gate count shift circuit that allows for efficient processing of data. This helps to reduce energy consumption and allows for the use of a smaller size barrel shifter, which is less expensive and consumes less energy than other solutions. Overall, the patent provides a way to improve the efficiency and performance of integrated circuits.

Problems solved by technology

However, simply limiting address generation operations for an ASIP to reduce power consumption can limit computational performance.

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